Artículos de revistas
Magneto-optical probe of quantum Hall states in a wide parabolic well modulated by random potential
Fecha
2012Registro en:
PHYSICAL REVIEW B, COLLEGE PK, v. 85, n. 4, supl. 1, Part 6, pp. S193-S198, 38353, 2012
1098-0121
10.1103/PhysRevB.85.045302
Autor
Pusep, Yuri A
Fernandes dos Santos, L.
Smirnov, D.
Bakarov, A. K.
Toropov, A. I.
Institución
Resumen
Polarized photoluminescence from weakly coupled random multiple well quasi-three-dimensional electron system is studied in the regime of the integer quantum Hall effect. Two quantum Hall ferromagnetic ground states assigned to the uncorrelated miniband quantum Hall state and to the spontaneous interwell phase coherent dimer quantum Hall state are observed. Photoluminescence associated with these states exhibits features caused by finite-size skyrmions: dramatic reduction of the electron spin polarization when the magnetic field is increased past the filling factor nu = 1. The effective skyrmion size is larger than in two-dimensional electron systems.